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                [TOC] Go語言的結構體沒有構造函數,我們可以自己實現。 例如,下方的代碼就實現了一個 Student 的構造函數。 因為struct是 **值類型** ,如果結構體比較復雜的話,**值拷貝性能開銷會比較大,所以該構造函數返回的是結構體指針類型,亦是推薦使用**。 ```go package main import "fmt" // Student 是學生的結構體 type Student struct { sid, age int name string course []string } // NewStudent 是學生結構體的構造函數 func NewStudent(sid, age int, name string, course []string) *Student { return &Student{ sid: sid, age: age, name: name, course: course, } } func main() { // 調用構造函數 s1 := NewStudent(1, 18, "jiaxzeng", []string{}) fmt.Printf("s1: %#v\n", s1) fmt.Printf("s1: %#v\n", *s1) } // 運行結果: // s1: &main.Student{sid:1, age:18, name:"jiaxzeng", course:[]string{}} // s1: main.Student{sid:1, age:18, name:"jiaxzeng", course:[]string{}} ```
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